// reg1 = reg2 + const
public static Tile Reg_AddConst()
{
return(new Tile(typeof(AssignmentNode),
new[] {
makeTile <RegisterNode> (),
makeTile <AddOperatorNode> (
makeTile <RegisterNode> (),
makeTile <ConstantNode <long> > ()
)
},
(regNode, node) => {
var root = node as AssignmentNode;
var reg1 = root.Target as RegisterNode;
var addop = root.Source as AddOperatorNode;
var reg2 = addop.LeftOperand as RegisterNode;
var val = addop.RightOperand as ConstantNode <long>;
// reg = reg + 1 -> reg++
if (reg1 == reg2 && val.Value == 1L)
{
return new[] {
InstructionFactory.Inc(reg1),
InstructionFactory.Move(regNode, reg1)
};
}
else
{
return new[] {
InstructionFactory.Move(reg1, reg2), // r = left
InstructionFactory.Add(reg1, val), // r = left + right
InstructionFactory.Move(regNode, reg1)
};
}
}
));
}